When you have your mobile device replaced, you need to enrol a new one on O365.

  1. Install the Microsoft Authenticator app on your new device.
  2. Open a browser on your computer and sign in to O365 at https://login.microsoftonline.com.
  3. Sign in with your EdUHK email address and password, then click "Next".
  4. Verify your identity as usual. If you do not have your registered device (the old one) with you, click "Sign in another way" and choose "Call +XXX XXXX XXXX" or "TEXT +XXX XXXX XXXX" to verify your identity.
    Office 365 Login

  5. Other ways to verify your indentity
  6. Then click your profile icon in the top right-hand corner and select "View account".
    Access O365 My Account setting

  7. Choose "Security info" from the left menu, then click "+ Add method".
    Additional security verification

  8. Open the drop-down list and choose "Authenticator app", then click "Add".
    Choose to use Authenticator app

  9. Click "Next" if you have installed the Microsoft Authenticator app. If you have not downloaded the app, click "Download now".
    Authenticator app

  10. Click "Next".
    Authenticator app record

  11. When you see the following screen, open the Microsoft Authenticator app on your new device.
    MFA configure with QR code

  12. Click the + button in the top right-hand corner and choose “Work or school account”. When prompted, choose "Scan QR code".
    Add account on Authenticator app Add account on Authenticator appChoose to scan QR code

  13. Scan the QR code on the browser with your device. If you cannot use your phone camera, click "Can't scan image?" and enter the 9 digit code and the URL instead.
    (Note: For iPhone users, you may need to change the app permission to scan the QR code: Settings > Authenticator > Camera)
    Scan QR code from Authenticator app icon

  14. A 6 digit code will be shown and your account is added.
    Authenticator app icon

  15. Click "Next" on your computer.
    MFA configure with QR code

  16. A notification is sent to the Microsoft Authenticator app on your new device.
    Authenticator app icon

  17. You will receive a notification on your new device.
    Authenticator app icon

  18. Tap on the notification and click “Approve” for verification.
    Authenticator app icon

  19. When you see the following screen, click "Next".
    Notification Approved

  20. Your new device is registered successfully and it will be shown in the list of security info methods.
    List of registered devices

  21. From now on, all your registered devices will receive notifications from the Microsoft Authenticator app when you sign in. You only need to verify on one of the devices. If you want to remove the old device, click "Delete" next to the name of the device.